| incontestable(adjective, certain, true, ideal, all time) |
| undeniable(adjective, certain, true, definite, ideal) |
| incontrovertible(adjective, certain, true, ideal, all time) |
| indisputable(adjective, certain, true, ideal, all time) |
| undisputable(adjective, certain, true, ideal, all time) |
| unquestionable(adjective, certain, true, ideal, all time) |
| sure(adjective, certain, true, ideal, all time) |
| certain(adjective, certain, true, ideal, all time) |
| unequivocal(adjective, certain, ideal, all time, the best) |
| unanswerable(adjective, ideal, all time, the best) |
| irrefragable(adjective, ideal, all time, the best) |
| unchallengeable(adjective, ideal, all time, the best) |
| undisputed(adjective, ideal, all time, the best) |
| clear-cut(adjective, ideal, all time, the best) |
| irrefutable(adjective, clear, certain, true, definite) |
| positive(adjective, set, clear, certain, true) |
| unassailable(adjective, set, certain, true, definite) |
| unarguable |
| absolute(adjective, clear, certain, sure) |
| indubitable(adjective, set, clear, certain, true) |